feat(new tool): xml formatter (#457)

* feat(new tool): xml formatter

* feat(xml-formatter): added happy path e2e tests

* refactor(xml-formatter): improved unit tests

* refactor(xml-formatter): add better suitable icon

* feat(xml-formatter): added happy path e2e tests

* feat(xml-formatter): registered xml as syntax highlighter

* chore(auto-import): removed unused NSpace

---------

Co-authored-by: Corentin Thomasset <corentin.thomasset74@gmail.com>

7 files changed, 139 insertions, 0 deletions

diff --git a/src/components/TextareaCopyable.vue b/src/components/TextareaCopyable.vue
index 78f26d7..16e1151 100644
--- a/src/components/TextareaCopyable.vue
+++ b/src/components/TextareaCopyable.vue
@@ -25,6 +25,7 @@ const props = withDefaults(
 hljs.registerLanguage('sql', sqlHljs);
 hljs.registerLanguage('json', jsonHljs);
 hljs.registerLanguage('html', xmlHljs);
+hljs.registerLanguage('xml', xmlHljs);
 hljs.registerLanguage('yaml', yamlHljs);
 
 const { value, language, followHeightOf, copyPlacement, copyMessage } = toRefs(props);
diff --git a/src/tools/index.ts b/src/tools/index.ts
index 211a8a8..f451d67 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -57,6 +57,7 @@ import { tool as urlEncoder } from './url-encoder';
 import { tool as urlParser } from './url-parser';
 import { tool as uuidGenerator } from './uuid-generator';
 import { tool as macAddressLookup } from './mac-address-lookup';
+import { tool as xmlFormatter } from './xml-formatter';
 
 export const toolsByCategory: ToolCategory[] = [
   {
@@ -114,6 +115,7 @@ export const toolsByCategory: ToolCategory[] = [
       sqlPrettify,
       chmodCalculator,
       dockerRunToDockerComposeConverter,
+      xmlFormatter,
     ],
   },
   {
diff --git a/src/tools/xml-formatter/index.ts b/src/tools/xml-formatter/index.ts
new file mode 100644
index 0000000..fe28d3a
--- /dev/null
+++ b/src/tools/xml-formatter/index.ts
@@ -0,0 +1,12 @@
+import { Code } from '@vicons/tabler';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'XML formatter',
+  path: '/xml-formatter',
+  description: 'Prettify your XML string to a human friendly readable format.',
+  keywords: ['xml', 'prettify', 'format'],
+  component: () => import('./xml-formatter.vue'),
+  icon: Code,
+  createdAt: new Date('2023-06-17'),
+});
diff --git a/src/tools/xml-formatter/xml-formatter.e2e.spec.ts b/src/tools/xml-formatter/xml-formatter.e2e.spec.ts
new file mode 100644
index 0000000..11fbbd8
--- /dev/null
+++ b/src/tools/xml-formatter/xml-formatter.e2e.spec.ts
@@ -0,0 +1,23 @@
+import { expect, test } from '@playwright/test';
+
+test.describe('Tool - XML formatter', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('/xml-formatter');
+  });
+
+  test('Has correct title', async ({ page }) => {
+    await expect(page).toHaveTitle('XML formatter - IT Tools');
+  });
+
+  test('XML is converted into a human readable format', async ({ page }) => {
+    await page.getByTestId('input').fill('<foo><bar>baz</bar><bar>baz</bar></foo>');
+
+    const formattedXml = await page.getByTestId('area-content').innerText();
+
+    expect(formattedXml.trim()).toEqual(`
+<foo>
+  <bar>baz</bar>
+  <bar>baz</bar>
+</foo>`.trim());
+  });
+});
diff --git a/src/tools/xml-formatter/xml-formatter.service.test.ts b/src/tools/xml-formatter/xml-formatter.service.test.ts
new file mode 100644
index 0000000..2b14558
--- /dev/null
+++ b/src/tools/xml-formatter/xml-formatter.service.test.ts
@@ -0,0 +1,27 @@
+import { describe, expect, it } from 'vitest';
+import { formatXml } from './xml-formatter.service';
+
+describe('xml-formatter service', () => {
+  describe('formatXml', () => {
+    it('converts XML into a human readable format', () => {
+      const initString = '<hello><world>foo</world><world>bar</world></hello>';
+
+      expect(formatXml(initString)).toMatchInlineSnapshot(`
+        "<hello>
+            <world>
+                foo
+            </world>
+            <world>
+                bar
+            </world>
+        </hello>"
+      `);
+    });
+
+    it('returns an empty string if the input is not valid XML', () => {
+      const initString = 'hello world';
+
+      expect(formatXml(initString)).toEqual('');
+    });
+  });
+});
diff --git a/src/tools/xml-formatter/xml-formatter.service.ts b/src/tools/xml-formatter/xml-formatter.service.ts
new file mode 100644
index 0000000..3441f0b
--- /dev/null
+++ b/src/tools/xml-formatter/xml-formatter.service.ts
@@ -0,0 +1,28 @@
+import xmlFormat, { type XMLFormatterOptions } from 'xml-formatter';
+import { withDefaultOnError } from '@/utils/defaults';
+
+export { formatXml, isValidXML };
+
+function cleanRawXml(rawXml: string): string {
+  return rawXml.trim();
+}
+
+function formatXml(rawXml: string, options?: XMLFormatterOptions): string {
+  return withDefaultOnError(() => xmlFormat(cleanRawXml(rawXml), options) ?? '', '');
+}
+
+function isValidXML(rawXml: string): boolean {
+  const cleanedRawXml = cleanRawXml(rawXml);
+
+  if (cleanedRawXml === '') {
+    return true;
+  }
+
+  try {
+    xmlFormat(cleanedRawXml);
+    return true;
+  }
+  catch (e) {
+    return false;
+  }
+}
diff --git a/src/tools/xml-formatter/xml-formatter.vue b/src/tools/xml-formatter/xml-formatter.vue
new file mode 100644
index 0000000..d59cf8c
--- /dev/null
+++ b/src/tools/xml-formatter/xml-formatter.vue
@@ -0,0 +1,46 @@
+<script setup lang="ts">
+import { formatXml, isValidXML } from './xml-formatter.service';
+import type { UseValidationRule } from '@/composable/validation';
+
+const defaultValue = '<hello><world>foo</world><world>bar</world></hello>';
+const indentSize = useStorage('xml-formatter:indent-size', 2);
+const collapseContent = useStorage('xml-formatter:collapse-content', true);
+
+function transformer(value: string) {
+  return formatXml(value, {
+    indentation: ' '.repeat(indentSize.value),
+    collapseContent: collapseContent.value,
+    lineSeparator: '\n',
+  });
+}
+
+const rules: UseValidationRule<string>[] = [
+  {
+    validator: isValidXML,
+    message: 'Provided XML is not valid.',
+  },
+];
+</script>
+
+<template>
+  <div important:flex-full important:flex-shrink-0 important:flex-grow-0>
+    <div flex justify-center>
+      <n-form-item label="Collapse content:" label-placement="left">
+        <n-switch v-model:value="collapseContent" />
+      </n-form-item>
+      <n-form-item label="Indent size:" label-placement="left" label-width="100" :show-feedback="false">
+        <n-input-number v-model:value="indentSize" min="0" max="10" w-100px />
+      </n-form-item>
+    </div>
+  </div>
+
+  <format-transformer
+    input-label="Your XML"
+    input-placeholder="Paste your XML here..."
+    output-label="Formatted XML from your XML"
+    output-language="xml"
+    :input-validation-rules="rules"
+    :transformer="transformer"
+    :input-default="defaultValue"
+  />
+</template>